Graphs and equations have been devised to correct for the adverse effects of magnesium upon the Na-K-Ca geothermometer. Either the graphs or equations can be used to determine temperature corrections when given waters have Na-K-Ca calculated temperatures above 70/sup 0/C and values of R less than 50, where R = (Mg/(Mg + Ca + K)) x 100 in equivalents. Water with values of R greater than 50 probably come from relatively cool aquifers with temperatures about equal to the measured spring temperature, irrespective of much higher calculated Na-K-Ca temperatures.
Publisher Info:
Geological Survey, Menlo Park, CA (USA)
Place of Publication:
Menlo Park, California
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Description
Graphs and equations have been devised to correct for the adverse effects of magnesium upon the Na-K-Ca geothermometer. Either the graphs or equations can be used to determine temperature corrections when given waters have Na-K-Ca calculated temperatures above 70/sup 0/C and values of R less than 50, where R = (Mg/(Mg + Ca + K)) x 100 in equivalents. Water with values of R greater than 50 probably come from relatively cool aquifers with temperatures about equal to the measured spring temperature, irrespective of much higher calculated Na-K-Ca temperatures.
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24 pages
Notes
Geological Survey, Open File Service, Denver Federal Center, Box 25425, Denver, CO 80225.
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Fournier, R. O. & Potter, R. W., II.Magnesium correction for the Na-K-Ca chemical geothermometer,
report,
January 1, 1978;
Menlo Park, California.
(https://digital.library.unt.edu/ark:/67531/metadc1113271/:
accessed July 18, 2025),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
